Hatchling octopuses are born with tiny, temporary organs that look like microscopic brooms. Researchers may finally have an idea what they do.
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Australian researchers have discovered the widest, and quite possibly the oldest, coral colony in the Great Barrier Reef, which they have named "Muga dhambi."
NOAA researchers spotted a mysterious, blood-red jellyfish deep off the New England coast. It may be a new species unknown to science.
The metamorphoses the creature undergoes are so dramatic, it took scientists a century to figure out its different forms belonged to the same zoological family.
Acclaimed horror director Eli Roth has a new documentary on a horrific subject: the shark finning trade.
Researchers just sunk a drill 5 miles below the Pacific Ocean's surface to dig the deepest hole below the ocean in history.
A new study looks at how scientists captured the world's first (and second) recordings of a giant squid in its natural habitat.
A survey recently mapped a vast industrial dumping ground in the ocean basin between the Los Angeles coast and Catalina Island.
For the first time, researchers have captured images of bizarre brown trails on an Arctic ridge that appear to have been left by sponges crawling across the seafloor.
At least 90 mysterious blobs of underwater jelly have been sighted near Norway and the Mediterranean Sea, and researchers finally know what they are.
Scientists propose that the circling could calibrate the animals' magnetic biosensors, in much the same way as submarines circle.
Every few years, millions of by-the-wind sailor jellyfish wash up on beaches and die. What is causing so many of them to become stranded? The blob could be to blame.
Octopuses can "see" light with their arms, even when their eyes are in the dark, researchers have found.
Two species of sacoglossan sea slugs have been found to be able to sever their heads from their bodies and regrow a replacement by researchers in Japan.
The Gulf Stream, one of Earth's major climate-regulating currents, is flowing slower now than it has in 1600 years. Climate change could kill it.
A new study reveals pirate attacks are more common in waters experiencing destructive and illegal fishing, suggesting the two may be linked.